{{Jargon|<random number>|||When using any number in game chat (sometimes prefixed with a #) we are talking about a train, with the number being the train's number so other people can look it up quickly}}

{{Jargon|1st tier, primaries|||The name that is used for all industries that produce raw (not processed) cargo, the coalmine for example. It is also used for trains that transport raw cargo, they are called "1st tier trains" or "primary trains".}}

{{Jargon|2nd tier, secondaries|||The name that is used for all the industries that accept raw cargo and possibly produce a new cargo. When trains transport this new cargo they're called "2nd tier trains" or "secondary trains".}}

{{Jargon|BBH|Backbone_Hub|Backbone hub|A hub that connects multiple mainlines with each other}}

{{Jargon|CL|Max Curve Speed|Curve Length|CL stands for curve length mostly used to describe how big a curve must be to let pass trains with a certain train length at full speed.}}

{{Jargon|Drop|Basic Stations|Stations|A Station where cargo is delivered to}}

{{Jargon|GRF|GRF|GRF|GRFs are small extensions to OTTD's graphics and gameplay.}}

{{Jargon|ML|Mainline|Mainline|ML stands for mainline which is, as the name suggests, the most important line in a network, it is where most of the trains spend the biggest part of their journey.}}

{{Jargon|IRC|IRC|IRC|Internet Relay Chat.}}

{{Jargon|LL / RR|||or variations are indicating directions on a main- or sideline}}

{{Jargon|Pickup|Basic Stations|Stations|A station where trains pick up cargo}}

{{Jargon|RV|||Road vehicle}}

{{Jargon|SL|Sideline|Sideline|Lines that connect industry stations with the mainline, they lead from the station to the sideline hub which connects it to the mainline.}}

{{Jargon|SLH|Sideline_Hub|Sideline hub|A hub that connects a sideline to the mainline}}

{{Jargon|SML|Shift_Mainlines|SML page|SML stands for "Shift Main Line".}}

{{Jargon|TF|Terraforming|Terraforming|TF is short for Terraform(ing).}}

{{Jargon|TL|User:Tim/Tilelength|TrainLength|TL is short for TrainLength. Indicating the amount of tiles a train occupies.}}

{{Jargon|Terminus station|Main station|Main station|A train station where trains enter and exit from the same direction, as opposed to [[Roll in Roll out|Ro-Ro]]}}

{{Jargon|Tile|||A square on the map}}